Where was the big mudslide in Washington state?
Oso
Landslide debris blocked the North Fork Stillaguamish River, destroyed about 40 homes and other structures, and buried nearly a mile of State Route 530. Most tragically, it caused 43 fatalities in the community of Steelhead Haven near Oso, Washington. Oso was emblematic of a worst-case landslide scenario.
What was the final event that triggered the fatal 2014 Oso mudslide in Washington state?
2014 Oso mudslide
| Oso mudslide on March 29, 2014, view to the northeast | |
|---|---|
| Date | March 22, 2014 |
| Coordinates | 48°16′57″N 121°50′53″WCoordinates: 48°16′57″N 121°50′53″W |
| Cause | Suspected soil saturation from heavy rainfall |
| Deaths | 43 |
What caused the 2014 Oso landslide in Washington?
Oso mudslide and recovery timeline Previous mudslides and slope erosion dating back to the 1930s likely set the stage for the catastrophic 2014 Oso mudslide. 1900s – Seasonal high water begins eroding the hill that eventually gave way in the 2014 mudslide. The Stillaguamish River channel pushes north.
Where was the landslide in Washington state?
On March 22, 2014, 43 people die when a portion of a hill suddenly collapses and buries a neighborhood in the small community of Oso, Washington, some 55 miles northeast of Seattle. It was one of the deadliest mudslides in U.S. history.
What was the deadliest mudslide?
Deadliest Landslides In Recorded History
- Huaraz Debris Flows, Ancash, Peru, December 1941 (5,000 deaths)
- 62 Nevado Huascaran Debris Fall, Ranrahirca, Peru, January 1962 (4,500 deaths)
- Khait Landslide, Tajikstan, July 1949 (4,000 deaths))
- Diexi Slides, Sichuan, China, August 1933 (3,000+ deaths)
How many died in Oso mudslide?
41
2014 Oso mudslide/Number of deaths
Could the Oso landslide have been predicted?
Scientists predicted the Oso landslide, but nothing was done. The report did say that heavy rain in the weeks before the landslide were a factor. It suggested that the destabilization of soil from a 2006 slide in the same place and logging.
How could the Oso mudslide been avoided?
How could this tragedy have been avoided? The best way to avoid such tragedies is through the approval process for residential subdivisions. In California, for example, such a process would be governed by a local subdivision ordinance as well as by the California Environmental Quality Act.
What was the main trigger of the Oso landslide?
A deadly landslide that killed 44 and obliterated a riverside neighborhood in Washington state last March was fueled by rain soaking the site of an eight-year-old landslide, while logging in the area may have also played a role, according to a scientific report released Tuesday.
What was the biggest mudslide?
Famous Mudslides By Fatalities
| Rank | Mudslide Name | Location |
|---|---|---|
| 1 | 1999 Vargas Tragedy | Vargas, Venezuela |
| 2 | 1985 Armero Tragedy | Tolima, Colombia |
| 3 | 2013 India Monsoons | Uttarakhand, India |
| 4 | 2010 Gansu Mudslide | Zhouqu County, China |
What has been the 10 worst landslide disasters in history?
When did the Oso landslide happen in Washington State?
The Oso landslide, also known as the SR 530 landslide, occurred in northwest Washington state on March 22, 2014, leading to devastating loss of life and destruction of property. Landslide debris blocked the North Fork Stillaguamish River, destroyed about 40 homes and other structures,…
What do you need to know about landslides in Oregon?
There are also notice, disclosure, and covenant requirements for development activities in a landslide hazard area. The Washington Geological Survey and the Oregon Department of Geology and Mineral Industries have created a handout that defines and explains landslides. You can find it online (PDF).
Where is the headcarp in the Oso landslide?
USGS hydrologist Mark Reid examines an extensional basin in the middle of the Oso landslide deposit. The headscarp (near-vertical cliff at the back of the landslide) is visible at the top of the image. The prominent tree is one of many that fell and became perched as the landslide spread out over the river valley.
What was the spider used for in the Oso landslide?
The spider was equipped with a seismometer (mounted on the far left leg) to track ground shaking and GPS (a dome-shaped instrument on the upper mast) to track subtle ground movement. Data was transmitted via telemetry (tall, white cylindrical antenna mounted on the steel trunk) to USGS field crews.